perf: optimize file access promises (#12275)

Improves performance in local strategy uploads by reading the file and
metadata info synchronously. This change uses `promise.all` for three
separately awaited calls. This improves the perf by making all calls in
a non-blocking way.

Author: DanRibbens

packages/payload/src/uploads/generateFileData.ts

@@ -10,7 +10,7 @@ import type { SanitizedConfig } from '../config/types.js'
 import type { PayloadRequest } from '../types/index.js'
 import type { FileData, FileToSave, ProbedImageSize, UploadEdits } from './types.js'
 
-import { FileRetrievalError, FileUploadError, MissingFile } from '../errors/index.js'
+import { FileRetrievalError, FileUploadError, Forbidden, MissingFile } from '../errors/index.js'
 import { canResizeImage } from './canResizeImage.js'
 import { cropImage } from './cropImage.js'
 import { getExternalFile } from './getExternalFile.js'
@@ -85,6 +85,10 @@ export const generateFileData = async <T>({
   if (!file && uploadEdits && incomingFileData) {
     const { filename, url } = incomingFileData as FileData
 
+    if (filename && (filename.includes('../') || filename.includes('..\\'))) {
+      throw new Forbidden(req.t)
+    }
+
     try {
       if (url && url.startsWith('/') && !disableLocalStorage) {
         const filePath = `${staticPath}/${filename}`

packages/payload/src/uploads/getFileByPath.ts

@@ -5,28 +5,28 @@ import path from 'path'
 
 import type { PayloadRequest } from '../types/index.js'
 
-const mimeTypeEstimate = {
+const mimeTypeEstimate: Record<string, string> = {
   svg: 'image/svg+xml',
 }
 
 export const getFileByPath = async (filePath: string): Promise<PayloadRequest['file']> => {
-  if (typeof filePath === 'string') {
-    const data = await fs.readFile(filePath)
-    const mimetype = fileTypeFromFile(filePath)
-    const { size } = await fs.stat(filePath)
+  if (typeof filePath !== 'string') {
+    return undefined
+  }
 
-    const name = path.basename(filePath)
-    const ext = path.extname(filePath).slice(1)
+  const name = path.basename(filePath)
+  const ext = path.extname(filePath).slice(1)
 
-    const mime = (await mimetype)?.mime || mimeTypeEstimate[ext]
+  const [data, stat, type] = await Promise.all([
+    fs.readFile(filePath),
+    fs.stat(filePath),
+    fileTypeFromFile(filePath),
+  ])
 
-    return {
-      name,
-      data,
-      mimetype: mime,
-      size,
-    }
+  return {
+    name,
+    data,
+    mimetype: type?.mime || mimeTypeEstimate[ext],
+    size: stat.size,
   }
-
-  return undefined
 }